That arn computer well is important.

本讲为2006年下半年新的教学内容，请对照讲义听声音！       Students(researcher/scholar) of Nature are not satisfied1 with guessing, but they observe, day after day, the changes which take place in an object; and they see many things which most people would fail to see. And thus they have found that the real difference between plants and animals lies in what they do, and not in what they seem to be.       We now know that about one fourth of all the kinds of seaweed are animals. A few years ago all of them were classed as plants. It was long supposed that the main difference between animals and plants was that the former could move about while the latter could not. But this difference will not hold good.(established)       How then are we to know whether a living object is a plant or an animal? plants can live on inorganic2 matter; they have the power of changing earth and air and water into substances3 which enter into and become a part of themselves. Animals can live only on what plants have already turned from inorganic to vegetable matter. Animals, although they need some inorganic food, cannot live on it alone.       All the food that keeps our bodies strong, or makes them grow, was once in the vegetable form.  No bird nor fish nor other animal could ever have lived on this earth, if the plants had not come first and fitted it for the dwelling4 place of a higher order of beings.       plants are the true fairies that are forever working wonders around us. Their roots dig5 down into the earth and gather its treasures. Their leaves spread their broad surfaces to the air and take in its riches; and out of what they have thus gathered they produce the beautiful flowers, the delicious fruits, and the golden6 grain.       That arn computer well is important.   That we learn computer well is important.   I like the computer that my mum bought me on my birthday.   Three fourths   one third----two thirds   Human beings   I had learned7 5000 words by the end of last year.   The plane had already taken off when I got to the airport.

1 satisfied   

adj.满意的，满足的；清偿过的；确信的，毫无疑问的v.使满意( satisfy的过去式和过去分词)

参考例句：

• She's never satisfied with what she's got. 她对自己的所得从不感到满足。
• He had a self-satisfied smirk on his face. 他脸上挂着得意扬扬的笑容。

2 inorganic   

adj.无生物的；无机的

参考例句：

• The fundamentals of inorganic chemistry are very important.无机化学的基础很重要。
• This chemical plant recently bought a large quantity of inorganic salt.这家化工厂又买进了大量的无机盐。

3 substances   

n.物质( substance的名词复数 )；实质；物体；[哲学]1)。 本质

参考例句：

• substances with high levels of toxicity 毒性大的物质
• Many highly corrosive substances are used in the nuclear industry. 核工业使用许多腐蚀性很强的物质。 来自《简明英汉词典》

4 dwelling   

n.住宅，住所，寓所

参考例句：

• Those two men are dwelling with us.那两个人跟我们住在一起。
• He occupies a three-story dwelling place on the Park Street.他在派克街上有一幢3层楼的寓所。

5 dig   

v.挖（洞，沟等）；掘

参考例句：

• It is difficult to dig the ground when it is frozen.地面冻住了就不易挖掘。
• In those days we often went to dig for wild vegetables.那时候我们常常出去挖野菜。

6 golden   

adj.金的，含金的，可贵的，金色的，贵重的，繁盛的

参考例句：

• My teacher is an Englishman with golden hair.我的老师是一个金黄色头发的英国人。
• It's a balmy evening,the golden time for lovers.这是一个暖和的夜晚，是恋人们的黄金时光。

7 learned   

adj.有学问的，博学的；learn的过去式和过去分词

参考例句：

• He went into a rage when he learned about it.他听到这事后勃然大怒。
• In this little village,he passed for a learned man.在这个小村子里，他被视为有学问的人。